Patent US2472916A successfully refreshed from Google Patents.
US2472916A
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Electromagnetic checkerboard
Assignee: Individual
•
Filing: 1945-10-08
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Granted: 1949-06-14
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Expires: 1965-10-08
Abstract
No abstract record available.
Inventors
- 👤 James M Moon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:18
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/00643; A63F3/00694; A63F3/00173; A63F3/00574; A63F2003/0063; A63F2003/00678; A63F2003/0069; A63F9/00; A63F9/34; A63F2009/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1043318A
Cited
US927583A
Cited
US1605703A
Cited
US1648956A
Cited
US2065193A
Cited
US2012519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |